Collarbone Alley is one of the descent options down to the main parking area. It has an uncanny resemblance to some of the whoop-de-dos and bermed up corners that the MoJos trail in Fruita has. Instead of descending Jack's Trail
, look for a singletrack and sign just to the left at the top of Jack's Trail
. Enjoy the fast flowy descent as it doesn't last long.